8TA Greenstone

I went into 8TA Greenstone store on 7th December to arrange international roaming. I received a sms on 13th December advising this was resolved. On phoning the service centre to confirm i was advised there had been a technical error and to just go into the store and they will be able to resolve this immediately. I went into the store this morning and was advised there was nothing they could do to help me. No manager available to speak to, rest of staff locked themselves into their office. I am going overseas and need to be in contact with my family. The service is disgusting all you get is rolling eyes and clicking of tongues. I am disgusted.